graph G {
    compound="true"
    rankdir="TB"
    bgcolor="white"
    fontname="Tahoma"

    node [
        fixedsize="false"
        fontname="Tahoma"
        color="white"
        fillcolor="deepskyblue2"
        fontcolor="black"
        shape="box"
        style="filled"
        penwidth="1.0"
    ]
    edge [
        fontname="Arial"
        color="#DC143C"
        fontcolor="black"
        fontsize="12"
        arrowsize="0.5"
        penwidth="1.0"
    ]




    "advanced_source" -- "intermediate_source" [label=" 250 ", penwidth="10", color="#DC143CFF"];
    "advanced_source" -- "prototype_source" [label=" 246 ", penwidth="9", color="#DC143CED"];
    "beginner_source/introyt" -- "recipes_source/recipes" [label=" 234 ", penwidth="9", color="#DC143CED"];
    "beginner_source/blitz" -- "recipes_source/recipes" [label=" 147 ", penwidth="5", color="#DC143CA5"];
    "beginner_source/blitz" -- "beginner_source/introyt" [label=" 106 ", penwidth="4", color="#DC143C93"];
    "beginner_source" -- "recipes_source/recipes" [label=" 84 ", penwidth="3", color="#DC143C82"];
    "beginner_source" -- "intermediate_source" [label=" 72 ", penwidth="2", color="#DC143C70"];
    "beginner_source/basics" -- "beginner_source/blitz" [label=" 56 ", penwidth="2", color="#DC143C70"];

}